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arXiv 1502.02484cs.LO
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基于子句组求解器API的QBF最小不可满足核的增量计算

Incrementally Computing Minimal Unsatisfiable Cores of QBFs via a Clause Group Solver API

Florian Lonsing, Uwe Egly

摘要:

我们考虑QBF的最小不可满足核(MUC)的增量计算。为此,我们为增量QBF求解器DepQBF配备了一个新的API,以允许基于子句组的增量求解。子句组是一组子句,这些子句被递增地添加到先前求解的QBF中或从先前求解的QBF中移除。我们的新API的实现与基于选择器变量和假设的增量SAT求解有关。然而,API完全隐藏了用户的选择器变量和假设,这有利于DepQBF在其他工具中的集成。我们目前的实施细节,并首次报告相关的实验使用DepQBF的新条款组API的QBF的MUCs的计算。

英文摘要:

We consider the incremental computation of minimal unsatisfiable cores (MUCs) of QBFs. To this end, we equipped our incremental QBF solver DepQBF with a novel API to allow for incremental solving based on clause groups. A clause group is a set of clauses which is incrementally added to or removed from a previously solved QBF. Our implementation of the novel API is related to incremental SAT solving based on selector variables and assumptions. However, the API entirely hides selector variables and assumptions from the user, which facilitates the integration of DepQBF in other tools. We present implementation details and, for the first time, report on experiments related to the computation of MUCs of QBFs using DepQBF's novel clause group API.

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